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- Path: luggage.rednet.co.uk!usenet
- From: johnd@reflex-tech.co.uk (John Dalton)
- Newsgroups: comp.sys.m68k
- Subject: Re: User/Supervisor Mode
- Date: Sat, 23 Mar 1996 19:01:05 GMT
- Organization: Reflex Technology
- Message-ID: <4j1hqv$24c@luggage.rednet.co.uk>
- References: <NEWTNews.17103.826679995.TOMVK@aestvk.eunet.be>
- Reply-To: johnd@reflex-tech.co.uk
- NNTP-Posting-Host: an049.du.pipex.com
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-
- aeslw@pophost.eunet.be wrote:
-
- >I was wondering if anyone out there has had much experience using the M68k
- >(we use the M68332) in User/Supervisor Mode.
- ..
- >etc). We are using a multi-tasking executive and this creates other
- >problems in how to safely handle a context switch, hardware interrupts etc.
- >Our executive (c-task, ported) needs to perform the above tasks in the
- >most efficient manner possible. Another requirement is that our User tasks
- >be written in C.
-
- I don't know c-task but I know trap interfaces slow down your
- application. Is a trap the only way to access c-task? Can't you link
- directly to its code and run your whole application in supervisory
- mode? Or don't you trust the code to behave itself?
-
- I know one solution, but it involves using a memory-protected kernel
- linked to your application, and would probably cost a lot more than
- what you have now. But it would be tidy.
-
- >Our solutions to date have been......untidy..... :)
-
- Regards, John
-
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